1. Cardiovascular Pathophysiology and Genomics Research Unit, School of Physiology, Faculty of Health Sciences, University of the Witwatersrand, 7 York Road, Parktown, 2193 Johannesburg, South Africa
2. Hypertension in Africa Research Team (HART), Faculty of Health Sciences, North-West University, Potchefstroom, South Africa
3. MRC Research Unit for Hypertension and Cardiovascular Disease, Faculty of Health Sciences, North-West University, Potchefstroom, South Africa
4. Department of Life and Consumer Sciences, University of South Africa (UNISA), Science Campus, Roodepoort, South Africa
5. Department of Biological and Environmental Sciences, Faculty of Natural Science, Walter Sisulu University, Mthatha, South Africa
6. Dischem Pharmacies, South Africa
7. Clinical Pharmacy Division, Department of Pharmacy and Pharmacology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
8. Developmental Pathways to Health Research Unit, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
9. Imperial Clinical Trials Unit, Imperial College London, Stadium House, 68 Wood Lane, London W12 7RH, UK
10. Department of Primary Care and Public Health, Imperial College London, St Dunstan’s Road, London W6 8RP, UK